When you are trying to learn a musical instrument like a guitar, wouldn't it be great to have a mobile app that would automatically recognize the musical notes of the song that is being played?
The idea is to create an iOS and Android app that can decipher and transcribe musical notes from a song that is being played. Inversely, you could also take a picture of the song notes and it could replay the notes in the instruments of your choice for you to hear. This could help you learn music faster.